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American Journal of Applied Sciences 6 ( 7 ): 1289 - 1294 , 2009
Zuraidah Yahya, Aminuddin Husin, Jamal Talib, Jamarei Othman, Osumanu Haruna Ahmed and Mohamadu Boyie Jalloh
American Journal of Applied Sciences 6 ( 12 ): 2006 - 2009 , 2009